Research Article

Effect of Artificial Saliva on the Apatite Structure of Eroded Enamel

Figure 2

Shift of the major ATR IR peak near 1015 cm−1 for enamel stored in water versus number of 1-minute treatments with citric acid, pH = 2.23 (a); experimental spectrum of untreated enamel (bold black line) fitted with 4 Lorentzians (thin gray lines) and the resultant profile (dashed gray line) (b). The error bars in (a) correspond to uncertainties in peak positions resulting from spectrum profile fittings. The position of the second Lorentzian is 1012 cm−1, which value was taken as initial wavenumber to calculate the peak position changes.